The WMC-0.3-8-20dB-S from Werbel Microwave is a Directional Coupler with Frequency 0.3 to 8 GHz, Coupling 20 dB, Coupling Variation ±1.2 dB, Frequency Sensitivity ±0.60 to ±1.20 dB, Directivity 16 to 25 dB. Tags: Module with Connectors. More details for WMC-0.3-8-20dB-S can be seen below.